CN108281700A - Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte - Google Patents
Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte Download PDFInfo
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- CN108281700A CN108281700A CN201810055479.7A CN201810055479A CN108281700A CN 108281700 A CN108281700 A CN 108281700A CN 201810055479 A CN201810055479 A CN 201810055479A CN 108281700 A CN108281700 A CN 108281700A
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- electrolyte
- lithium
- organic solvent
- functional additive
- carbonate
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 55
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical group [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000013538 functional additive Substances 0.000 claims abstract description 23
- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 12
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- WCZCMTAZUXIZRR-UHFFFAOYSA-N 1-phenyl-2h-borinine Chemical compound C1C=CC=CB1C1=CC=CC=C1 WCZCMTAZUXIZRR-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000008151 electrolyte solution Substances 0.000 claims description 5
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 4
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical class O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- 229910001290 LiPF6 Inorganic materials 0.000 claims description 3
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 claims description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 3
- GLNWILHOFOBOFD-UHFFFAOYSA-N lithium sulfide Chemical class [Li+].[Li+].[S-2] GLNWILHOFOBOFD-UHFFFAOYSA-N 0.000 claims description 3
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 2
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical group C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 claims description 2
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 claims description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical group CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 2
- 229910013188 LiBOB Inorganic materials 0.000 claims description 2
- 229910000552 LiCF3SO3 Inorganic materials 0.000 claims description 2
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 claims description 2
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims description 2
- 150000002898 organic sulfur compounds Chemical class 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 125000004646 sulfenyl group Chemical group S(*)* 0.000 claims description 2
- -1 LiBC2O4F2 Inorganic materials 0.000 claims 2
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 229910013164 LiN(FSO2)2 Inorganic materials 0.000 claims 1
- 125000005587 carbonate group Chemical group 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010494 dissociation reaction Methods 0.000 abstract description 2
- 239000007772 electrode material Substances 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 239000010405 anode material Substances 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 125000006091 1,3-dioxolane group Chemical class 0.000 description 2
- 229910005143 FSO2 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZXMGHDIOOHOAAE-UHFFFAOYSA-N 1,1,1-trifluoro-n-(trifluoromethylsulfonyl)methanesulfonamide Chemical compound FC(F)(F)S(=O)(=O)NS(=O)(=O)C(F)(F)F ZXMGHDIOOHOAAE-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- UFLFSNVZQRNKOX-UHFFFAOYSA-N carbonic acid;ethenyl acetate Chemical compound OC(O)=O.CC(=O)OC=C UFLFSNVZQRNKOX-UHFFFAOYSA-N 0.000 description 1
- ABDBNWQRPYOPDF-UHFFFAOYSA-N carbonofluoridic acid Chemical compound OC(F)=O ABDBNWQRPYOPDF-UHFFFAOYSA-N 0.000 description 1
- 230000022131 cell cycle Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- UQXKXGWGFRWILX-UHFFFAOYSA-N ethylene glycol dinitrate Chemical compound O=N(=O)OCCON(=O)=O UQXKXGWGFRWILX-UHFFFAOYSA-N 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical class [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- SYHGEUNFJIGTRX-UHFFFAOYSA-N methylenedioxypyrovalerone Chemical compound C=1C=C2OCOC2=CC=1C(=O)C(CCC)N1CCCC1 SYHGEUNFJIGTRX-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
the invention discloses an electrolyte, a preparation method and a secondary lithium-sulfur battery using the electrolyte, wherein the electrolyte comprises a lithium salt, an organic solvent and a functional additive, the concentration of the lithium salt in the electrolyte is 0.5-5 mol/L, the mass percentage of the functional additive in the electrolyte is 0.1-3%, the lithium salt is added into the organic solvent, the lithium salt is uniformly stirred to prepare the electrolyte, the functional additive is added into the electrolyte, and the functional additive is continuously stirred to be uniformly mixed to obtain the functional electrolyte of the secondary lithium-sulfur battery6Dissociation reaction of (3), adsorption of free F‑Thereby reducing HF formed by trace water and reducing corrosion of HF to electrode materials; effectively inhibiting the capacity attenuation of the anode material in the circulation process and improving the circulation stability and capacity retention rate of the lithium-sulfur battery.
Description
Technical field
The present invention relates to technical field of lithium batteries, specifically a kind of electrolyte and preparation method with use the two of the electrolyte
Secondary lithium-sulfur cell.
Background technology
In recent years, lithium ion battery lithium ion battery is excellent with mass energy density height and volume energy density height etc. with it
Gesture is widely used in mobile electronic device and electric vehicle field.However, with the rapid development of electric vehicle, it is right
The performance requirement of lithium ion battery also steps up.Lithium-sulfur rechargeable battery energy density is high, is made using sulphur simple substance or sulphur-containing substance
For the lithium-sulfur cell of positive active material, theory is 2600Whkg than energy-1.In addition, lithium-sulfur cell also has Sulphur ressource rich
The advantages that rich, cheap, environment friendly and pollution-free is a kind of very battery with application prospect.
The electrolyte of lithium-sulfur cell mostly uses greatly ether organic solvent now, such as 1,3- dioxolanes and glycol dinitrate
Ether, in ethers electrolyte, the high-valence state polysulfide ion generated in lithium-sulfur cell discharge process is soluble in electrolyte, and high-valence state is poly-
Sulphion diffuses to cathode of lithium and side reaction occurs to generate irreversible lithium sulfide to be the important original for restricting lithium-sulfur cell cycle performance
Cause.The structure of positive electrode is mainly designed for the solution of above-mentioned problem at present to improve performance, and uses nitre
Sour lithium is with obvious effects but ideal not enough as electrolyte cathode additive agent.Positive film for additive is for improving lithium sulphur
Battery performance plays an important role, less for the research of positive film for additive at present.
Invention content
It is an object of the invention to overcome defect of the existing technology, a kind of electrolyte and preparation method and use are provided
The secondary lithium-sulfur battery of the electrolyte, additive may participate in positive electrode solid electrolyte interface (SEI in electrolyte of the present invention
Film) formation, enhance SEI films electric conductivity；The free F of absorption-, to reduce the HF formed due to trace water, reduce HF
Corrosion to electrode material.Improve the cyclical stability and capacity retention ratio of lithium-sulfur cell.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of secondary lithium-sulfur battery function electrolyte, which includes lithium salts, organic solvent and functional additive, described
A concentration of 0.5~the 5mol/L of lithium salts in the electrolytic solution, the mass percent of the functional additive in the electrolytic solution be 0.1~
3%.
Further scheme, the functional additive are five phenylborine of trifluoro, and structural formula is：
The mass percent of functional additive in the electrolytic solution preferably 0.5~1%.
Further scheme, the lithium salts are LiPF6、LiBF4、LiBOB、LiBC2O4F2、LiClO4、LiCF3SO3、LiN
(FSO2)2、LiN(CF3SO2)2One or more of.
Further scheme, one kind in carbonate based organic solvent or ether organic solvent of the organic solvent or
Two kinds.
Further scheme, the carbonate based organic solvent are ethylene carbonate, vinylene carbonate, fluoro carbonic acid second
One or more of enester, propene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate.
Further scheme, the ether organic solvent are dioxolane, dioxane, glycol dimethyl ether, diethyl two
One or more of diethylene glycol dimethyl ether, tetraethyleneglycol dimethyl ether, ethylene glycol diethyl ether or diethylene glycol diethyl ether.
It is another object of the present invention to provide a kind of preparation methods of electrolyte, which is characterized in that organic solvent
Middle addition lithium salts, electrolyte is configured to after stirring evenly, and then to functional additive is added in electrolyte, continues stirring to mixing
Uniformly, that is, secondary lithium-sulfur battery function electrolyte is prepared.
It is a still further object of the present invention to provide a kind of secondary lithium-sulfur batteries, including above-mentioned electrolyte, the anode used
Material is elemental sulfur, more lithium sulfides, sulfenyl composite material, organic sulfur compound or sulphur carbon polymer etc..
Beneficial effects of the present invention：Electrolyte of the present invention may participate in using five phenylborine of trifluoro as functional additive
The formation of solid electrolyte interface (SEI films) can dissolve LiF, enhance the electric conductivity of SEI films；Five phenylborine of trifluoro has
Conducive to promotion LiPF6Dissociation reaction, adsorb free F-, to reduce the HF formed due to trace water, reduce HF to electrode
The corrosion of material.The capacity attenuation for effectively inhibiting positive electrode in cyclic process, improves the cyclical stability and appearance of lithium-sulfur cell
Measure conservation rate.
Description of the drawings
Fig. 1 is that the electrolyte for being 0.5% by functional additive in blank electrolysis liquid and embodiment 3 assembles the normal of lithium-sulfur cell
Warm cycle performance.
Specific implementation mode
Present invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
By volume 1 in glove box:1 uniformly mixes 1,3- dioxolanes and glycol dimethyl ether, to the mixed solvent
It is middle that double trifluoromethanesulfonimide lithiums are added, it stirs evenly, the electrolyte of a concentration of 1mol/L is made, 1wt% lithium nitrates are added.
Five phenylborine of functional additive trifluoro is added into the electrolyte, obtains function electrolyte, the functional additive accounts for electrolysis
The mass percentage content of liquid gross weight is respectively 0.1%, 0.5%, 1%, 2%, 3%.
Embodiment 2
By volume 1 in glove box:1:1 uniformly mixes fluorinated ethylene carbonate, propene carbonate and ethylene glycol diethyl
Ether, it is 1 that molar ratio, which is added, to the in the mixed solvent:1 LiN (FSO2)2With LiN (CF3SO2)2, stir evenly, be made a concentration of
The electrolyte of 0.5mol/L.Five phenylborine of functional additive trifluoro is added into the electrolyte, obtains function electrolyte, it is described
The mass percentage content that functional additive accounts for electrolyte gross weight is respectively 0.1%, 0.5%, 1%, 2%, 3%.
Embodiment 3
By volume 1 in glove box:1 uniform mixed carbonic acid vinyl acetate and ethyl methyl carbonate, to the mixed solvent
Middle addition LiBC2O4F2, stir evenly, the electrolyte of a concentration of 5mol/L be made.Functional additive three is added into the electrolyte
Five phenylborine of fluorine, obtains function electrolyte, and the mass percentage content that the functional additive accounts for electrolyte gross weight is respectively
0.1%, 0.5%, 1%, 2%, 3%.
Embodiment 4
It is assembled into battery and carries out electrochemical property test
The preparation of positive electrode：Sulphur carbon composite is prepared with heat melting method, sulphur powder and porous carbon are pressed into quality 4:1 places
In ball grinder, 12 hours mixings of ball milling are transferred in corundum boat, 155 DEG C of heat preservations 24 in the tube furnace full of nitrogen atmosphere
Hour, sulphur carbon composite (S/C) is obtained, by S/C:Conductive carbon:PVDF is 8 in mass ratio:1:1 prepares slurry, is coated in aluminium
On foil, pole piece is prepared into after drying.
The assembling and test of battery：It is diaphragm with celgard2400, lithium metal is cathode, and electrolyte is work(in embodiment 3
Can additive be 0.5% electrolyte and blank electrolysis liquid, sulphur carbon anode be assembled into 2016 button cells, 1.0~3.0V it
Between carry out charge-discharge test, with AC impedance of the CHI604D electrochemical workstations test battery under open-circuit voltage.
The normal temperature circulation of button cell is as shown in Figure 1, be added after 0.5% functional additive, cyclical stability is apparent
It improves, capacity retention ratio is higher.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to case study on implementation, and described herein one
As principle be applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to implementation cases here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (8)
1. a kind of electrolyte, which is characterized in that the electrolyte includes lithium salts, organic solvent and functional additive, and the lithium salts exists
A concentration of 0.5~5mol/L in electrolyte, the mass percent of the functional additive in the electrolytic solution are 0.1~3%.
2. electrolyte according to claim 1, which is characterized in that the functional additive is five phenylborine of trifluoro,
Structural formula is：
The mass percent of functional additive in the electrolytic solution preferably 0.5~1%.
3. electrolyte according to claim 1, which is characterized in that the lithium salts is LiPF6、LiBF4、LiBOB、
LiBC2O4F2、LiClO4、LiCF3SO3、LiN(FSO2)2、LiN(CF3SO2)2One or more of.
4. electrolyte according to claim 1, which is characterized in that the organic solvent is selected from carbonate based organic solvent
Or one or both of ether organic solvent.
5. electrolyte according to claim 4, which is characterized in that the carbonate based organic solvent is ethylene carbonate
Ester, vinylene carbonate, fluorinated ethylene carbonate, propene carbonate, ethyl methyl carbonate, dimethyl carbonate, carbonic acid diethyl
One or more of ester.
6. electrolyte according to claim 4, which is characterized in that the ether organic solvent is dioxolane, dioxy
Six rings, glycol dimethyl ether, diethylene glycol dimethyl ether, tetraethyleneglycol dimethyl ether, ethylene glycol diethyl ether or diethylene glycol diethyl ether
One or more of.
7. the preparation method of electrolyte as described in claim 1, which is characterized in that lithium salts is added into organic solvent, stirs
It is configured to electrolyte after uniformly, then to functional additive is added in electrolyte, continues stirring to being uniformly mixed, that is, is prepared
Secondary lithium-sulfur battery function electrolyte.
8. a kind of secondary lithium-sulfur battery, which is characterized in that comprising the electrolyte described in any one of claim 1-4, use
Positive electrode be elemental sulfur, more lithium sulfides, sulfenyl composite material, organic sulfur compound or sulphur carbon polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055479.7A CN108281700A (en) | 2018-01-19 | 2018-01-19 | Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810055479.7A CN108281700A (en) | 2018-01-19 | 2018-01-19 | Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte |
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| Publication Number | Publication Date |
|---|---|
| CN108281700A true CN108281700A (en) | 2018-07-13 |
Family
ID=62804190
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| CN201810055479.7A Withdrawn CN108281700A (en) | 2018-01-19 | 2018-01-19 | Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987803A (en) * | 2018-07-17 | 2018-12-11 | 四川华昆能源有限责任公司 | A kind of lithium an- ode film forming electrolyte and its additive for lithium-sulfur cell |
| CN109004272A (en) * | 2018-07-20 | 2018-12-14 | 珠海格力电器股份有限公司 | Electrolyte mixed solvent and lithium ion battery |
| CN110137573A (en) * | 2019-05-31 | 2019-08-16 | 中国科学院金属研究所 | It is a kind of using lithium metal as the electrolyte for lithium secondary batteries of cathode |
| CN110247052A (en) * | 2019-06-14 | 2019-09-17 | 中国科学技术大学 | Metal fluoride nano particle additive, preparation method and the battery comprising it |
| CN114730871A (en) * | 2019-11-05 | 2022-07-08 | 学校法人关西大学 | Electrolyte, lithium-sulfur secondary battery and assembly |
-
2018
- 2018-01-19 CN CN201810055479.7A patent/CN108281700A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108987803A (en) * | 2018-07-17 | 2018-12-11 | 四川华昆能源有限责任公司 | A kind of lithium an- ode film forming electrolyte and its additive for lithium-sulfur cell |
| CN109004272A (en) * | 2018-07-20 | 2018-12-14 | 珠海格力电器股份有限公司 | Electrolyte mixed solvent and lithium ion battery |
| CN110137573A (en) * | 2019-05-31 | 2019-08-16 | 中国科学院金属研究所 | It is a kind of using lithium metal as the electrolyte for lithium secondary batteries of cathode |
| CN110247052A (en) * | 2019-06-14 | 2019-09-17 | 中国科学技术大学 | Metal fluoride nano particle additive, preparation method and the battery comprising it |
| CN114730871A (en) * | 2019-11-05 | 2022-07-08 | 学校法人关西大学 | Electrolyte, lithium-sulfur secondary battery and assembly |
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